diff --git a/default.nix b/default.nix
new file mode 100644
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,20 @@
+{
+  mkDerivation, stdenv
+, aeson, base, containers, data-default, mtl, text, unordered-containers, websockets
+}:
+
+mkDerivation {
+  pname = "hleap";
+  version = "0.2.0.0";
+  src = ./.;
+  isLibrary = true;
+  isExecutable = true;
+  libraryHaskellDepends = [
+    aeson base containers data-default mtl text unordered-containers websockets
+  ];
+  executableHaskellDepends = [
+  ];
+  homepage = "https://bitbucket.org/functionally/hleap";
+  description = "Web Socket interface to Leap Motion controller";
+  license = stdenv.lib.licenses.mit;
+}
diff --git a/hleap.cabal b/hleap.cabal
--- a/hleap.cabal
+++ b/hleap.cabal
@@ -1,58 +1,64 @@
-name:                hleap
-version:             0.1.2.7
-synopsis:            Web Socket interface to Leap Motion controller
-description:         This Haskell package contains functions for interfacing with Leap Motion controllers, \<<https://www.leapmotion.com/product/desktop>\>.  It is based on the WebSocket API \<<https://developer.leapmotion.com/documentation/javascript/supplements/Leap_JSON.html>\> and inspired by \<<https://bitbucket.org/turion/jedinight/>\>.
-
-license:             MIT
-license-file:        LICENSE
-author:              Brian W Bush <consult@brianwbush.info>
-maintainer:          Brian W Bush <consult@brianwbush.info>
-copyright:           (c) 2016 Brian W Bush
-category:            Hardware
-build-type:          Simple
-cabal-version:       >= 1.10
-stability:           Stable
-homepage:            https://bitbucket.org/functionally/hleap
-bug-reports:         https://bwbush.atlassian.net/projects/HLEAP/issues/
-package-url:         https://bitbucket.org/functionally/hleap/downloads/hleap-0.1.2.7.tar.gz
+name         : hleap
+version      : 0.2.0.0
+synopsis     : Web Socket interface to Leap Motion controller
+description  : This Haskell package contains functions for interfacing with Leap Motion controllers, \<<https://www.leapmotion.com/product/desktop>\>.  It is based on the WebSocket API \<<https://developer.leapmotion.com/documentation/javascript/supplements/Leap_JSON.html>\> and inspired by \<<https://bitbucket.org/turion/jedinight/>\>.
+license      : MIT
+license-file : LICENSE
+author       : Brian W Bush <code@functionally.io>
+maintainer   : Brian W Bush <code@functionally.io>
+copyright    : (c) 2016-19 Brian W Bush
+category     : Hardware
+build-type   : Simple
+cabal-version: >= 1.10
+stability    : Stable
+homepage     : https://bitbucket.org/functionally/hleap
+bug-reports  : https://bwbush.atlassian.net/projects/HLEAP/issues/
+package-url  : https://bitbucket.org/functionally/hleap/downloads/hleap-$version.tar.gz
 
-extra-source-files:  ReadMe.md
+extra-source-files: ReadMe.md
+                    default.nix
 
 source-repository head
-  type: git
+  type    : git
   location: https://bitbucket.org/functionally/hleap.git
  
 library
-  build-depends:       base                 >= 4.8 && < 5
-               ,       aeson                >= 0.10.0.0
-               ,       containers           >= 0.5.6.2
-               ,       data-default         >= 0.5.3
-               ,       mtl                  >= 2.2.1
-               ,       text                 >= 1.2.1.3
-               ,       unordered-containers >= 0.2.5.1
-               ,       websockets           >= 0.9.6.1
-  exposed-modules:     System.Hardware.Leap
-                       System.Hardware.Leap.Event
-                       System.Hardware.Leap.Event.Gesture
-                       System.Hardware.Leap.Event.Hand
-                       System.Hardware.Leap.Event.Pointable
-                       System.Hardware.Leap.Types
-  hs-source-dirs:   src
-  exposed:          True
-  buildable:        True
-  ghc-options:      -Wall
+  exposed-modules : System.Hardware.Leap
+                    System.Hardware.Leap.Event
+                    System.Hardware.Leap.Event.Gesture
+                    System.Hardware.Leap.Event.Hand
+                    System.Hardware.Leap.Event.Pointable
+                    System.Hardware.Leap.Types
+  build-depends   : base                 >= 4.8 && < 5
+                  , aeson                >= 1.3.1
+                  , containers           >= 0.5.10
+                  , data-default         >= 0.7.1
+                  , mtl                  >= 2.2.2
+                  , text                 >= 1.2.3
+                  , unordered-containers >= 0.2.9
+                  , websockets           >= 0.12.5
+  hs-source-dirs  : src
+  exposed         : True
+  buildable       : True
+  ghc-options     : -Wall
   default-language: Haskell2010
 
 executable leap-tracker
-  main-is:             Main.hs
-  build-depends:       base >=4.8 && <4.9
-               ,       aeson
-               ,       containers
-               ,       data-default
-               ,       mtl
-               ,       text
-               ,       unordered-containers
-               ,       websockets
-  hs-source-dirs:      src
-  ghc-options:         -Wall
-  default-language:    Haskell2010
+  main-is         : Main.hs
+  other-modules   : System.Hardware.Leap
+                    System.Hardware.Leap.Event
+                    System.Hardware.Leap.Event.Gesture
+                    System.Hardware.Leap.Event.Hand
+                    System.Hardware.Leap.Event.Pointable
+                    System.Hardware.Leap.Types
+  build-depends   : base                 >= 4.8 && < 5
+                  , aeson                >= 1.3.1
+                  , containers           >= 0.5.10
+                  , data-default         >= 0.7.1
+                  , mtl                  >= 2.2.2
+                  , text                 >= 1.2.3
+                  , unordered-containers >= 0.2.9
+                  , websockets           >= 0.12.5
+  hs-source-dirs  : src
+  ghc-options     : -Wall
+  default-language: Haskell2010
diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -1,11 +1,10 @@
 {-|
-Module      :  Main
-Copyright   :  (c) 2016 Brian W Bush
+Module      :  $Header$
+Copyright   :  (c) 2016-19 Brian W Bush
 License     :  MIT
-Maintainer  :  Brian W Bush <consult@brianwbush.info>
+Maintainer  :  Brian W Bush <code@functionally.io>
 Stability   :  Stable
 Portability :  Portable
-
 
 Tracing events from Leap Motion \<<https://www.leapmotion.com/product/desktop>\>, based on the Web Socket API \<<https://developer.leapmotion.com/documentation/javascript/supplements/Leap_JSON.html>\>.
 -}
diff --git a/src/System/Hardware/Leap.hs b/src/System/Hardware/Leap.hs
--- a/src/System/Hardware/Leap.hs
+++ b/src/System/Hardware/Leap.hs
@@ -1,11 +1,10 @@
 {-|
-Module      :  System.Hardware.Leap
-Copyright   :  (c) 2016 Brian W Bush
+Module      :  $Header$
+Copyright   :  (c) 2016-19 Brian W Bush
 License     :  MIT
-Maintainer  :  Brian W Bush <consult@brianwbush.info>
+Maintainer  :  Brian W Bush <code@functionally.io>
 Stability   :  Stable
 Portability :  Portable
-
 
 Interaction with Leap Motion \<<https://www.leapmotion.com/product/desktop>\>, based on the Web Socket API \<<https://developer.leapmotion.com/documentation/javascript/supplements/Leap_JSON.html>\>.
 
diff --git a/src/System/Hardware/Leap/Event.hs b/src/System/Hardware/Leap/Event.hs
--- a/src/System/Hardware/Leap/Event.hs
+++ b/src/System/Hardware/Leap/Event.hs
@@ -1,11 +1,10 @@
 {-|
-Module      :  System.Hardware.Leap.Event
-Copyright   :  (c) 2016 Brian W Bush
+Module      :  $Header$
+Copyright   :  (c) 2016-19 Brian W Bush
 License     :  MIT
-Maintainer  :  Brian W Bush <consult@brianwbush.info>
+Maintainer  :  Brian W Bush <code@functionally.io>
 Stability   :  Stable
 Portability :  Portable
-
 
 Events for Leap Motion \<<https://www.leapmotion.com/product/desktop>\>, based on the Web Socket API \<<https://developer.leapmotion.com/documentation/javascript/supplements/Leap_JSON.html>\>.
 -}
diff --git a/src/System/Hardware/Leap/Event/Gesture.hs b/src/System/Hardware/Leap/Event/Gesture.hs
--- a/src/System/Hardware/Leap/Event/Gesture.hs
+++ b/src/System/Hardware/Leap/Event/Gesture.hs
@@ -1,11 +1,10 @@
 {-|
-Module      :  System.Hardware.Leap.Event.Gesture
-Copyright   :  (c) 2016 Brian W Bush
+Module      :  $Header$
+Copyright   :  (c) 2016-19 Brian W Bush
 License     :  MIT
-Maintainer  :  Brian W Bush <consult@brianwbush.info>
+Maintainer  :  Brian W Bush <code@functionally.io>
 Stability   :  Stable
 Portability :  Portable
-
 
 Gesture events for Leap Motion \<<https://www.leapmotion.com/product/desktop>\>, based on the Web Socket API \<<https://developer.leapmotion.com/documentation/javascript/supplements/Leap_JSON.html>\>.
 -}
diff --git a/src/System/Hardware/Leap/Event/Hand.hs b/src/System/Hardware/Leap/Event/Hand.hs
--- a/src/System/Hardware/Leap/Event/Hand.hs
+++ b/src/System/Hardware/Leap/Event/Hand.hs
@@ -1,8 +1,8 @@
 {-|
-Module      :  System.Hardware.Leap.Event.Hand
-Copyright   :  (c) 2016 Brian W Bush
+Module      :  $Header$
+Copyright   :  (c) 2016-19 Brian W Bush
 License     :  MIT
-Maintainer  :  Brian W Bush <consult@brianwbush.info>
+Maintainer  :  Brian W Bush <code@functionally.io>
 Stability   :  Stable
 Portability :  Portable
 
diff --git a/src/System/Hardware/Leap/Event/Pointable.hs b/src/System/Hardware/Leap/Event/Pointable.hs
--- a/src/System/Hardware/Leap/Event/Pointable.hs
+++ b/src/System/Hardware/Leap/Event/Pointable.hs
@@ -1,11 +1,10 @@
 {-|
-Module      :  System.Hardware.Leap.Event.Pointable
-Copyright   :  (c) 2016 Brian W Bush
+Module      :  $Header$
+Copyright   :  (c) 2016-19 Brian W Bush
 License     :  MIT
-Maintainer  :  Brian W Bush <consult@brianwbush.info>
+Maintainer  :  Brian W Bush <code@functionally.io>
 Stability   :  Stable
 Portability :  Portable
-
 
 Pointable events for Leap Motion \<<https://www.leapmotion.com/product/desktop>\>, based on the Web Socket API \<<https://developer.leapmotion.com/documentation/javascript/supplements/Leap_JSON.html>\>.
 -}
diff --git a/src/System/Hardware/Leap/Types.hs b/src/System/Hardware/Leap/Types.hs
--- a/src/System/Hardware/Leap/Types.hs
+++ b/src/System/Hardware/Leap/Types.hs
@@ -1,11 +1,10 @@
 {-|
-Module      :  System.Hardware.Leap.Event.Types
-Copyright   :  (c) 2016 Brian W Bush
+Module      :  $Header$
+Copyright   :  (c) 2016-19 Brian W Bush
 License     :  MIT
-Maintainer  :  Brian W Bush <consult@brianwbush.info>
+Maintainer  :  Brian W Bush <code@functionally.io>
 Stability   :  Stable
 Portability :  Portable
-
 
 Types for Leap Motion \<<https://www.leapmotion.com/product/desktop>\>, based on the Web Socket API \<<https://developer.leapmotion.com/documentation/javascript/supplements/Leap_JSON.html>\>.
 -}